selenium

noun

se·​le·​ni·​um sə-ˈlē-nē-əm How to pronounce selenium (audio)
: a photosensitive element that occurs in both crystalline and amorphous forms, is obtained chiefly as a by-product in copper refining, and is used especially in glass, semiconductor devices, and alloys see Chemical Elements Table

Examples of selenium in a Sentence

Recent Examples on the Web Once operational, the smelter will annually produce up to 222,000 tonnes of copper cathode, 830,000 tonnes of sulfuric acid, 18 tonnes of gold bars, 55 tonnes of silver bars, and 70 tonnes of selenium. Yessar Rosendar, Forbes, 28 Mar. 2024 This is largely due to the mineral composition of spring water, which contains varying amounts of sulfur, manganese, magnesium, zinc, selenium, strontium, silica, and calcium bicarbonate. Jack Knudson, Discover Magazine, 26 Mar. 2024 This pack will provide you with a comprehensive prenatal vitamin with key nutrients, including methylated B vitamins, vitamins A, C, E, and D, choline, and important minerals like iron, iodine, zinc, selenium, and magnesium. Casey Seiden, Parents, 22 Mar. 2024 Similarly, sunflower seeds are rich in selenium, a mineral that helps preserve skin elasticity and prevent premature aging. Daphne Ewing-Chow, Forbes, 29 Feb. 2024 The soak is infused with mustard seed and rosemary and is rich in magnesium, selenium and antioxidants, a bath elixir that we’re told helps relieve pain and inflammation while boosting the immune system and promoting relaxation and overall well-being. Ben Davidson, The Mercury News, 26 Feb. 2024 Eggs Several nutrients can help your immune system, including vitamins A, C, D, and E, selenium, and zinc.4 Eggs are an option that has a few of those nutrients. Cynthia Sass, Mph, Rd, Health, 31 Oct. 2023 Testing by the utility identified selenium and thallium in the effluent there. Connor Giffin, The Courier-Journal, 23 Jan. 2024 Foods high in antioxidants such as vitamins C, D and E and minerals like zinc and selenium can benefit your immune system and overall health. Theara Coleman, theweek, 20 Jan. 2024

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'selenium.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

Etymology

New Latin, from Greek selēnē moon, from selas brightness

First Known Use

1818, in the meaning defined above

Time Traveler
The first known use of selenium was in 1818

Dictionary Entries Near selenium

Cite this Entry

“Selenium.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/selenium. Accessed 16 Apr. 2024.

Kids Definition

selenium

noun
se·​le·​ni·​um sə-ˈlē-nē-əm How to pronounce selenium (audio)
: an element that is sensitive to light and is used especially in glass, alloys, and electronic devices see element

Medical Definition

selenium

noun
se·​le·​ni·​um sə-ˈlē-nē-əm How to pronounce selenium (audio)
: a nonmetallic photosensitive element that occurs in both crystalline and amorphous forms, is an essential trace element found especially in grains and meat, and is used chiefly in glass, semiconductor devices, and alloys
symbol Se
see Chemical Elements Table, selenosis

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